Introduction and principle of anti-theft device

Electronic fence is the most advanced perimeter security alarm system at present, which consists of electronic fence host (JS-TD20 10) and front-end detection fence. The electronic fence host generates and receives high-voltage pulse signals, which can generate alarm signals when the front end detects that the fence is in the state of touching the net, short circuit and open circuit, and send intrusion signals to the security alarm center; The front-end detection fence is a tangible perimeter composed of rods and metal wires. Multi-level networking can be realized by controlling the keyboard or control software. Electronic fence is an active intrusion prevention fence, which can resist intrusion attempts, repel intruders, delay the invasion time, and not threaten people's life safety. It sends intrusion signals to the monitoring equipment of the security department to ensure that managers can know the situation in the alarm area in time and deal with it quickly. The blocking function of electronic fence is first embodied in the deterrent function. Warning signs are hung on the metal wire, which will produce psychological pressure when seen, and will feel electric shock when touching the fence, which is enough to deter intruders. Secondly, the electronic fence itself is a tangible obstacle, and it is difficult to climb if it is installed at a suitable height and angle; If forced to break through, the host will send out an alarm signal. The development of electronic fence originated in Europe and America, and the modern electronic fence originated in Australia. Electronic fence can be divided into security electronic fence, animal husbandry electronic fence and zoo special electronic fence. At present, it has been widely used in China, and has been successfully applied to major projects such as the Olympic Games, the World Expo and the State Grid, and has become the main product in the field of perimeter alarm. In 2008, the national standard of electronic fence was promulgated, and its standard number was GB/T7946-2008.

Working principle of electronic fence alarm;

The pulse electronic fence system is different from the traditional high-voltage power grid, which can identify intentional intrusion and unintentional intrusion. And can intelligently identify the intrusion location and effectively block it without causing personal injury. The voltage output of the main engine of the pulse electronic fence meets the indexes of international standards/national standards. The pulse voltage with low frequency, low energy and high voltage (5000V~ 10000V) has a very short action time and will not cause harm to people. The main engine of pulse electronic fence can adjust the output pulse voltage at will, which is suitable for various places with different requirements for prevention level. The host of the pulse electronic fence can realize multi-level networking through the control keyboard or control software to ensure that the temporary situation in a certain area will not affect the normal use of other defense zones.

Functional characteristics of electronic fence alarm

(1) has the characteristics of physical barrier, active counterattack, delayed invasion and accurate alarm. (2) Based on the pulse mechanism, it has strong anti-interference ability and wide application range; (3) It is suitable for any complex terrain environment and convenient to implement; (4) It has zero false alarm rate and high reliability (it overcomes the technical defects of traditional infrared, induction and vibration cables, and the alarm is basically unaffected by climate, terrain and trees). (5) There are no blind spots, dead corners and loopholes. The fence in front is a tangible fence, which can be erected at will with the ups and downs of the terrain. (six) with completely independent intellectual property rights, built-in patented technology. (7) On the premise of ensuring the protection strength, it has no harm to human body. It is safe and reliable. Passed the type inspection of the Security and Police Electronic Products Testing Center of the Ministry of Public Security, passed the product quality and technical standard certification of the Provincial Bureau of Quality and Technical Supervision, and obtained the production and sales license of security products of the Ministry of Public Security. (8) Based on the brand-new perimeter protection concept of "blocking first, alarm second", the incidence rate is reduced through protective counterattack. Early response is realized by strong blocking and accurate alarm (9) deterrence integrates the functions of "strong blocking, deterrent counterattack and intelligent alarm": high-voltage pulse electricity in front of the fence gives intruders a great sense of deterrence; The tangible fence brings many obstacles to intruders: in case of forced intrusion, the system will automatically send out an audible and visual alarm, and it can be linked with other security systems (such as alarm host, video monitoring system, CCTV, 65438+).